Cushing Syndrome

Endocrinology

Chronic cortisol excess: exogenous (steroids) or endogenous (pituitary, adrenal, ectopic ACTH).

History taking

  • Weight gain (truncal), easy bruising, proximal weakness, menstrual change
  • Steroid use including topical/inhaled

Examination

  • Moon face, buffalo hump, purple striae, hypertension

Red flags

  • Haemodynamic instability
  • Rapid deterioration
  • Severe pain or new neurological deficit

Differential diagnosis

  • See differentials section per chief complaint

Recommended investigations

  • Confirm: 1 mg overnight DST, 24-h urinary free cortisol, late-night salivary cortisol (need 2 positive tests)
  • Localise: ACTH, pituitary MRI, adrenal CT

Diagnosis

  • Clinical diagnosis supported by targeted investigations

Initial treatment / management

  • Treat underlying cause
  • Symptomatic relief
  • Patient education

Follow-up advice

  • Review in 2–4 weeks or earlier if worsening
  • Monitor response to therapy and adverse effects

Patient counselling

  • Explain diagnosis and natural course in lay terms
  • Red-flag symptoms warranting urgent return
  • Adherence to medications and follow-up

Referral criteria

  • Endocrinology

References

  • Harrison's Principles of Internal Medicine, 21e
  • NICE / WHO guidelines (current edition)

Educational outpatient guide — verify against local guidelines before clinical use.

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